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wire 2026-05-27
stories 3
RSS Archive Reviews

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$ the-wire · showcase

NFSD REGRESSION FIXES AND KUNIT USE-AFTER-FREE PATCH HIT MAINLINE

By RepoJournal · Filed · About Linux · Composed from the cited sources · methodology

Three critical stability patches merged overnight address cache hash bounds, ftrace key leaks, and a fatal memory corruption bug in kunit that's already crashing CHERI-capable systems.

The nfsd-7.1-2 pull [1] lands two regressions and one stable fix that matter if you're running file serving at scale. Chuck Lever tightened bounds checking on sunrpc cache hash tables (the regression that broke things) and killed key material from ftrace logs, which was leaking sensitive data into your tracing pipeline. The lockd TEST procedure fix addresses a longstanding permission handling bug that's been backported to stable. Meanwhile, kunit's debugfs just got pulled from the fire [2]. A use-after-free when kunit.filter dynamically allocates resources was triggering fatal hardware exceptions on architectures like CHERI RISC-V that track capability flags in memory. Silent corruption on others. That patch stops the executor from freeing resources too early. Finally, Andrew Morton merged 13 mm hotfixes [3], with 9 targeted at stable. Nine patches across the memory subsystem, mostly singletons addressing post-7.1 regressions and allocation edge cases.

Action items

References

  1. [1] Merge tag 'nfsd-7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux torvalds/linux ↗
  2. [2] Merge tag 'linux_kselftest-kunit-fixes-7.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest torvalds/linux ↗
  3. [3] Merge tag 'mm-hotfixes-stable-2026-05-25-16-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm torvalds/linux ↗

$ ls linux/reviews/ # the step-back reads

the week in review Omarchy polkit PAM stack skipped system-auth the month in review Linux 7.3 rc cycle fixes cgroup kill, SMB corruption
Full archive → Weekly reviews →

Quick answers

What shipped in Linux on May 27, 2026?
Three critical stability patches merged overnight address cache hash bounds, ftrace key leaks, and a fatal memory corruption bug in kunit that's already crashing CHERI-capable systems. In total, 3 commits landed.
What were the notable Linux updates?
Merge tag 'nfsd-7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux, Merge tag 'linux_kselftest-kunit-fixes-7.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest, and Merge tag 'mm-hotfixes-stable-2026-05-25-16-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.
♥

$ log Linux --recent

drm-fixes backs out dma-buf debug, vfs closes pathwalk use-after-frees 29 shipped Netlink stops hashing the net pointer, stmmac clears a stuck RGMII interrupt 27 shipped Poly1305 carry fix lands, Omarchy locks down N1x laptops and idle fingerprint readers 23 shipped Omarchy copies agent logins over SSH, kernel queues 7.4 merges 106 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl rejects conflicting vLLM engine_kwargs, open-instruct adds MILES OPD behind a Megatron learner Interpretability nnsight 0.8.0 cuts import time from 7.6s to 1.6s

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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